Stone and ore crusher



(No Model.)

S., P. M. TASKLR.y

` STONE AND om: GRUSHBR. No. 262,996. Patennedmg. 2,2. 188.2l

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Inl/'enfonvUNTTED STATES!N PATENT @Ferca STEPHEN P. M. TASKER, OF PHILADELPHIA, PENNSYLVANIA.

STONE AND ORE CRUSHER.

SPECIFICATIQN forming part of Letters Patent No. 262,996, dated August 22, 1882,

' i Application tiled May 24, 1882. (No modele) To alt whom it may concern Be it known that I, STEPHEN P.M. Tnsxnu, of the city and county of Philadelphia, in the State ot' Pennsylvania, haveinvented an Improvement in Stone and Ore Crushers, ot which the following is a speciiication.

My invention relates in general to machines employed for crushing, disintegratin g, or triturating metallit'erous ores, stones, and other hard substances, and which machines are variously known as stone-breakers,77 ore-crushers,77 or grinding-mills.77

A preferred form of a convenient embodiment of my invention is hereinafter described and claimed.

In the accompanying drawings, Figure l is a top plan view of a Crusher or grinding-mill conveniently embodying my improvements,

good form to be that represented in the draw ings, in which the housing proper is a cylindric shell provided with a horizontal annular diaphragm, B, equipped with a series ot'journal-bearings, E, for the lower extremities of the axles ofthe crushing-cylinders D.

C are a series of brackets or Webs, which ar radially disposed with respect to the housing, and which centrally support the lower bearing, F, ofthe crushing-cone.

G is the crushingcone of suitable material, the surface of which is roughened or serrated.

His a hopper-casting in the nature of an annular cover-plate, which incloses at its upper portion the housing, and which is provided with a centrally-dischargin g hopper, I, with a series of bearings, J,4 for the upper extremities of the axles of the crushing-cylinders, and

with a central upperbearing, K, for the upper extremity of the shaft ot' the crushing-cone,

said upper bearing for the cone being preferably supported by radial Webs springing from the inclined sides of the hopper. By the above construction it Will be observed that the crushing-cone is verticallyr disposed centrally Within the housing, while the crushing-cylinders are vertically disposed therein coucentrically with respect to the crushing-cone and circumferentially with respect to the casing. Ot' course the precise construction recited may be departed from and other constructions resorted to for the purpose of enabling the placing and support, in the manner described, ot' the crushing-cone and cylinders. I have simply recited the specitic construction represented as aconvenient one.

M is a worm-wheel secured to the upper extremity ofthe shaft of the crushing-cone at a point above its upper bearing, and geared with a worm-shaft, N, suitably supported in a shaft bearing, O, bracketed from or connected with a housing. By means of the above worm-gear-y ing any'desired speed ot' rotation may be im-l parted to the crushing-cone.

Pare ball-bearings Vot' any preferredantifriction character, which are applied to` the axles of the crushing-cylinders, both at their upper and lower bearings, and tothe lower bearing of the axle of the crushingcone. These balls are ycontained in suitably-constructed tracks Q, of chilled iron or steel, and serve notonly to resist' the radial thrust upon the cylinders arising from the crushing operation, but also to support the weight ot' the cylinders and oft-he cone. They form a convenient and durable means ot' Vjournaling the revolving parts.

R is a vertical adjusting-screw adapted to adjust the vertical set of the lower bearing, F, ofthe crushing-cone.

I have denominated the central circular opening in the horizontal annular diaphragm, Within which opening the base of the cone is disposed, by the letter S. rIhis opening, which, in connection with the base of` the cone, forms the discharging-vent of the machine, is reamed out, so to speakffrom below upwardthat is to say, its side walls are not vertical, but are conically inclined in a plane correspondent to the plane of the exterior of the cone. These walls are, if desired, roughened or serrated,

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and serve to form a fixed surface against which the cone acts to crush. The size of this a the latter to more or less completely till this opening, and thereby regulate the width of the annular discharging-vent between the cone and opening, thereby in turn regulating the ineness to which the stones are broken. As already stated, both the cone and the cylinders are suitably roughened or serrated upon their surfaces. The cylinders are preferably so disposed with respect to the circular opening in the annular diaphragm and with respect to the cone that their inner peripheries register in line With the top of the circular opening, and are in close proximity tothe face ofthe cone at a point slightly above its eX- treme base. The vertical set of the cone of courseregulates the degree of nearness to which it shall approach the eXtreme inner peripheries of the cylinders.

T are a series of vents or escape-passa ges cut through the annular diaphragm around its outer circumference at points between the crushing-cylinders, as represented in Figs. 1 and 3. These vents are to enable the escape ofrrushed material happening to be carried between the cylinders and the outer portion of the diaphragm, and not happening to be `crushed and discharged in the usual manner.

Such being a description ot' a preferred construction ot' my apparatus, its operation will be readily understood. The cone is revolved, material is fed through the hopper around it,

and as the material descends it becomes engaged between the inclined faces of the revolving cone and the vertical inner faces of the crushing-cylinders, whereby the material itself occasions the revolution ofthe cylinders and becomes crushed between the said cylinders so revolved and the positively-revolving cone. rlhe operation is continuous, the material being continuously crushed and continuously discharged between the cone and the circular opening in the diaphragm. A sufcient amount of material is fed around the cone to almostcompletely ll the annular space between the cylinders and the cone, and to cause the greater portions of the surfaces of both cone and cylinders to be operative for the crushing action, the large lumps being gradually reduced in size, so that they gradually descend until they reach that lowermost point at which they are crushed to the degree of iineness desired, at which point they find their escape. The balls ease `the play of both cylinders and cone, and form` iournalsurfaces which are not injuriously affected by contact with pulverized material.

The device is compact, simple, and cheap of construction, and is adapted for the crushing of substances of varying sizes to varying degrees of iineness. Its action is continuous and positive, and it enables me to dispense with link-and-toggle connections and to employ but a few parts.

While I have represented and described worm-wheel gearing as imparting the requisite motionto the crushing-cone, it will yet be understood that other driving devices may be substituted for such gearing without departing from the essential features of construction of my device.

Having thus described my invention, I claim and desire to secure by Letters Patentl. A grinding-mill provided with a vertically-revolving grinding-cone, and with a series of revolvable grinding cylinders circumferentially disposed with respect to said cone.

2. In a stone and ore crushing machine, the combination of a revolving crushing-cone, a casing or housing provided with a hopper or kindred feed device adapted to discharge around the cone, and a series of verticallyerected crushing-cylinders arranged around the crushing-cone and exterior to the line of feed and discharge of material to be ground.

3. In a stone or ore crushing machine, in combination, a housing, a vertically-operating crushing-cone, a circular series of crushingcylinders surrounding said cone, and means for imparting rotation to said crushing-cone.

4. In a grinding-mill, the combination of a vertically-erected crushing-cone, a series of crushing-cylinders disposed in circumferential relation about the cone, a housing, and a series of anti-friction balls disposed in suitable relation in the housing about the shafts of the cone and cylinders, as and for the purpose set forth.

5. In a stone-crushing machine in which a series of crushing-cylinders surround a crushing-cone, a diaphragm provided with a circular opening within which the cone is placed and exterior to which opening the cylinders are located, and means for vertically adjusting the position of the cone, so as to regulate the breadth of the annular passageway formed between the cone and the opening in the diaphragm.

In testimony whereofI have hereunto signed my name this 20th day of May, A. D. 1882.

STEPHEN P. M. TASKER.

In presence'of- J. BoNsALL TAYLOR, W. C. STRAWBRIDGE.

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